The AMK Ranch is a former personal retreat on the eastern shore of Jackson Lake in Grand Teton National Park. Also known as the Merymare, Lonetree and Mae-Lou Ranch, it was a former homestead, expanded beginning in the 1920s by William Louis Johnson, then further developed in the 1930s by Alfred Berol (Berolzheimer).
Johnson built a lodge, barn and boathouse in 1927, while Berol added a larger lodge, new boathouse, and cabins, all in the rustic style. After acquisition by the National Park Service, it was designated the University of Wyoming - National Park Research Station The research center is cooperatively owned by the National Park Service and the university, directed by University of Wyoming zoology professor Michael E.